Explain Spark map() transformation?

376

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What are the types of transformation in RDD in Apache Spark?

336

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Why is transformation lazy operation in Apache Spark RDD? How is it useful?

302

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Explain fullOuterJoin() operation in Apache Spark?

447

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How many partitions are created by default in Apache Spark RDD?

319

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Explain coalesce operation in Apache Spark?

343

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Explain the level of parallelism in spark streaming?

300

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Explain join() operation in Apache Spark?

364

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How to process data using Transformation operation in Spark?

318

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What is Resilient Distributed Dataset (RDD) in Apache Spark? How does it make spark operator rich?

304

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What are the differences between Caching and Persistence method in Apache Spark?

323

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Explain the operation reduce() in Spark?

310

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Explain the lookup() operation in Spark?

245

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Explain the processing speed difference between Hadoop and Apache Spark?

304

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Explain the operation transformation and action in Apache Spark RDD?

348

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